2666148173405 has 8 divisors (see below), whose sum is σ = 3251826624984. Its totient is φ = 2097952660800.

The previous prime is 2666148173363. The next prime is 2666148173411. The reversal of 2666148173405 is 5043718416662.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 152445736249 + 2513702437156 = 390443^2 + 1585466^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2666148173405 - 2¹² = 2666148169309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4370734406 + ... + 4370735015.

It is an arithmetic number, because the mean of its divisors is an integer number (406478328123).

Almost surely, 2^{2666148173405} is an apocalyptic number.

It is an amenable number.

2666148173405 is a deficient number, since it is larger than the sum of its proper divisors (585678451579).

2666148173405 is an equidigital number, since it uses as much as digits as its factorization.

2666148173405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8741469487.

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 2666148173405 in words is "two trillion, six hundred sixty-six billion, one hundred forty-eight million, one hundred seventy-three thousand, four hundred five".